X6CrNiNb18-10 (1.4550) Duplex Stainless Steel 2" 4" 6" 8" 10" SCH40 UNS S32205 ANSI B16.5 Class 150 Raised Face Weld
Material Specifications
| Grade: |
X6CrNiNb18-10 |
| Number: |
1.4550 |
| Classification: |
Austenitic stainless steel - special grade |
| Density: |
7.9 g/cm³ |
Applicable Standards
- EN 10088-2:2005 Stainless steels - Technical delivery conditions for sheet/plate and strip
- EN 10088-3:2005 Stainless steels - Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products
- EN 10028-7:2007 Flat products made of steels for pressure purposes - Stainless steels
- EN 10222-5:2000 Steel forgings for pressure purposes - Martensitic, austenitic and austenitic-ferritic stainless steels
- EN 10216-5:2014 Seamless steel tubes for pressure purposes - Stainless steel tubes
- EN 10217-7:2005 Welded steel tubes for pressure purposes - Stainless steel tubes
- EN 10296-2:2005 Welded circular steel tubes for mechanical and general engineering purposes - Stainless steel
- EN 10253-3:2008 Butt-welding pipe fittings - Wrought austenitic and austenitic-ferritic (duplex) stainless steels
- EN 10253-4:2008 Butt-welding pipe fittings - Wrought austenitic and austenitic-ferritic (duplex) stainless steels
- EN 10272:2007 Stainless steel bars for pressure purposes
- EN 10250-4:2000 Open steel die forgings for general engineering purposes - Stainless steels
- EN 10297-2:2005 Seamless circular steel tubes for mechanical and general engineering purposes - Stainless steel
- EN 10088-1:2005 Stainless steels - List of stainless steels
- EN 10088-5:2009 Stainless steels - Technical delivery conditions for bars, rods, wire, sections and bright products
Material Illustration
Chemical Composition
EN 10088-2-2005: Nb = 10 * C to 1.0. Elements not listed shall not be intentionally added without purchaser agreement.
| Element |
Composition (%) |
| C |
max 0.08 |
| Si |
max 1 |
| Mn |
max 2 |
| Ni |
9 - 12 |
| P |
max 0.045 |
| S |
max 0.015 |
| Cr |
17 - 19 |
| Nb |
max 1 |
Mechanical Properties
Tensile Strength (Rm):
+A: 500-740 MPa | +AT: 510-740 MPa
0.2% Proof Strength (Rp0.2):
+AT: 205 MPa | +A: 200-240 MPa
Impact Energy (KV):
+A Transverse: +20°C: 60J | -196°C: 40J
+A Longitudinal: +20°C: 100J
Elongation at Fracture (A):
+A: 30-40% | +AT Longitudinal: 35%
Brinell Hardness (HB):
+A: 230 | +AT: 210
Material Properties
- Resistance to intergranular corrosion: Yes (delivery condition) | Yes (sensitized condition)
- Minimum application temperature: -196°C
International Equivalent Grades
| EU EN |
USA |
France AFNOR |
England BS |
Sweden SS |
Russia GOST |
| X6CrNiNb18-10 |
347 |
Z6CNNb18-10 |
347S31 |
2338 |
08KH18N12B |